If the cat is healthy with no UTI than I wouldn't worry about it not with you being pregnant.

Get a washable bed an throw it into the wash. Spray Fabreze all over the places you think she may start to wet and see if that breaks her.

This may have something to do with your pregnancy but you won't know until you have the baby.

You can go to http://www.thepetprofessor.com/